| Playmouth Fried Chicken Ltd | Hospitality | 2023 |
| Plessey Lighting Limited | Manufacturing | 2011 |
| Plessey Semiconductors Limited | Manufacturing | 2000 |
| Plester Shepherd Ltd | Real estate | 2006 |
| Pllz Limited | Hospitality | 2022 |
| Plug IT in Ltd | Construction | 2019 |
| Plug'N'Park Ltd | Transport & logistics | 2009 |
| Pluma Technologies Ltd | Information & communication | 2013 |
| Plumrock Property Limited | Real estate | 2021 |
| Plus 4 Limited | Hospitality | 2008 |
| Plusone Golf Ltd | Arts & recreation | 2014 |
| Plym Chamber CIC | Administrative & support | 2020 |
| Plym City Taxi Ltd | Transport & logistics | 2025 |
| Plym Fish Bar Ltd | Hospitality | 2014 |
| Plym Hair Extensions Limited | Wholesale & retail | 2015 |
| Plym Physio Ltd | Health & social care | 2015 |
| Plym Plating Works Limited | Extraterritorial | 1967 |
| Plym Pool Ltd | Arts & recreation | 2026 |
| Plym Scaffolding Solutions Ltd | Construction | 2024 |
| Plym Snooker Ltd | Arts & recreation | 2026 |
| Plym Valley (1-3) Management Company Limited | Households | 2006 |
| Plym Valley (52-54) Management Company Limited | Households | 2006 |
| Plym Yacht Club Ltd | Arts & recreation | 2026 |
| Plymbridge Properties Limited | Real estate | 2018 |
| Plymbridge Stores Ltd | Wholesale & retail | 2025 |
| Plymbrook Ltd | Professional & scientific | 2019 |
| Plymcare Limited | Administrative & support | 2022 |
| Plymco Limited | Real estate | 2022 |
| Plymcrete Holdings Limited | Financial services | 2018 |
| Plymcrete Southwest Limited | Manufacturing | 2011 |
| Plymdent Ltd | Manufacturing | 2025 |
| Plymevents Ltd | Arts & recreation | 2018 |
| Plymfix Build Group Ltd | Construction | 2025 |
| Plymglow Ltd | Other services | 2023 |
| Plymglow to Go Ltd | Administrative & support | 2024 |
| Plymhaven International Ltd | Extraterritorial | 2021 |
| Plymouth & Devon Racial Equality Council | Health & social care | 1999 |
| Plymouth & District Construction Training Group C.I.C. | Administrative & support | 2019 |
| Plymouth 50+ Ltd | Extraterritorial | 2013 |
| Plymouth Active Leisure Limited | Arts & recreation | 2021 |
| Plymouth Aerial Solutions Ltd | Manufacturing | 2011 |
| Plymouth Against Retail Crime Limited | Administrative & support | 2006 |
| Plymouth AGE Concern | Health & social care | 1980 |
| Plymouth Airport Transfers Ltd | Transport & logistics | 2014 |
| Plymouth Albion Rugby Football Club (2016) Limited | Arts & recreation | 2016 |
| Plymouth Anaesthesia LLP | | 2016 |
| Plymouth and District Disabled Fellowship Limited | Health & social care | 2000 |
| Plymouth and South Devon Freeport Limited | Administrative & support | 2022 |
| Plymouth Argaum Rugby Football Club Limited | Arts & recreation | 2017 |
| Plymouth Argyle Football in the Community Trust | Arts & recreation | 2009 |
| Plymouth Argyle Women’S Football Club Limited | Arts & recreation | 2024 |
| Plymouth Armed Forces & Veterans Breakfast Club CIC | Health & social care | 2021 |
| Plymouth Artificial Grass Ltd | Wholesale & retail | 2025 |
| Plymouth Arts Cinema | Arts & recreation | 1988 |
| Plymouth Auction Rooms Limited | Wholesale & retail | 2012 |
| Plymouth Auto Electrics Ltd | Wholesale & retail | 2012 |
| Plymouth Auto Garage Limited | Real estate | 2003 |
| Plymouth Baguettes Limited | Hospitality | 2015 |
| Plymouth Bangladeshi Association CIC | Hospitality | 2026 |
| Plymouth Barbican Fine Arts Management Company Limited | Households | 2005 |
| Plymouth Barbican Steakhouse Ltd | Hospitality | 2014 |
| Plymouth Bespoke Cycling Community Interest Company | Other services | 2026 |
| Plymouth Bike Breakers Limited | Wholesale & retail | 2004 |
| Plymouth Bike Hire Ltd | Administrative & support | 2019 |
| Plymouth Boat Club Limited | Administrative & support | 2021 |
| Plymouth Boat Fishing Limited | Agriculture & fishing | 2020 |
| Plymouth Boat Sales Limited | Wholesale & retail | 2007 |
| Plymouth Boat Trips Limited | Transport & logistics | 2008 |
| Plymouth Boatyard and Marina Ltd. | Manufacturing | 2007 |
| Plymouth Boutique Ltd | Wholesale & retail | 2026 |
| Plymouth Boxing Academy CIC | Arts & recreation | 2025 |
| Plymouth Building Company Limited | Construction | 2019 |
| Plymouth Building Solutions Ltd | Construction | 2025 |
| Plymouth Business Network | Other services | 2010 |
| Plymouth Cabs Ltd | Transport & logistics | 2024 |
| Plymouth Cafe Bar Ltd | Hospitality | 2024 |
| Plymouth Car Centre Limited | Wholesale & retail | 2019 |
| Plymouth Car Recoveries Limited | Transport & logistics | 2002 |
| Plymouth Car Sales Ltd | Wholesale & retail | 2025 |
| Plymouth Car Sound Limited | Wholesale & retail | 2025 |
| Plymouth Cardiac Solutions Ltd | Health & social care | 2023 |
| Plymouth Carpet Cleaners Limited | Administrative & support | 2009 |
| Plymouth Cars Ltd | Wholesale & retail | 2020 |
| Plymouth Cast | Education | 2013 |
| Plymouth Centre for Faiths and Cultural Diversity | Health & social care | 2001 |
| Plymouth Chimney and Flue Specialists Limited | Construction | 1997 |
| Plymouth Citizens Advice Bureaux | Health & social care | 1992 |
| Plymouth City Airport Limited | Real estate | 1975 |
| Plymouth City Hand Car Wash Ltd | Other services | 2017 |
| Plymouth City Ltd | Other services | 2015 |
| Plymouth City Pastors | Health & social care | 2008 |
| Plymouth City Projects Limited | Real estate | 2022 |
| Plymouth Cleaning Limited | Administrative & support | 2011 |
| Plymouth Coins Ltd | Wholesale & retail | 2025 |
| Plymouth College Enterprises Limited | Administrative & support | 2000 |
| Plymouth Community Dental Services Limited | Health & social care | 2013 |
| Plymouth Community Homes Energy Limited | Construction | 2012 |
| Plymouth Community Homes Regeneration Company Limited | Construction | 2010 |
| Plymouth Containers Ltd | Administrative & support | 2011 |
| Plymouth Contract Waste Ltd | Water & waste | 2021 |